Hi @Florence 

Here are some general tips to help you debug the issue

1. How are you specifying the Email Recipients? Using Variables or hard-coded values?
   If using variables, can you verify that the variables are having the correct values?
2. if you are having issues with the variables, just use hard-coded values for the email recipients eg “florence@example.com” or SP User “Florence Lastname”
   Its most unlikely for hard-coded Email recipient to fail.
3. Are the email recipients internal or external organization users?
   Have you been able to send emails to external users from Nintex Workflow before?
4. I suggest you to add a log right below each Send Email action.
   Enter some text which can help to identify the path eg “Taking YES path” for the Yes condition

Hi @Florence 
Have you resolved this issue?

Hi @MillaZ  not yet I’m still struggling.

Hi @Florence,

My suggestion to troubleshoot this issue.

1. Have the recipients check their junk folder in the email client.
2. Check the logs on the Exchange server to se if the emails were received by the server and if so what the server did with them.